Which organization is primarily responsible for training in aviation-related skills among youth?

The Air Training Corps (ATC) is specifically designed to provide training and development in aviation-related skills among youth. It aims to foster an interest in aviation and promote life skills through a structured program of activities that includes flying lessons, aircraft recognition, navigation, and aerospace knowledge. Members of the ATC engage in diverse activities that enhance their understanding of the principles of flight, military aviation, and teamwork, along with leadership training and various outdoor pursuits.

This focus on aviation distinguishes the Air Training Corps from the other options. Organizations like the Royal Navy Cadets and the Army Cadet Force may offer some elements related to aviation, but their primary emphases are on naval and military training, respectively. The RAF Auxiliary Force plays a different role as a reserve force complementing the Royal Air Force rather than focusing on youth training. Therefore, the clear and specific mission of the Air Training Corps makes it the correct answer for training youth in aviation skills.